Where does the wire go?

First I started blowing the MFI Buss fuse that is attached to the battery, I had sparks coming out of the housing that holds the throttle cable, figured short/grounding problem. cleaned up all grounds, new battery cables...it ran for a week. Now it's doing it again. Found a wire coming out of the wiring harness that the alternator wires come out of..It is yellow with thick black insulation. It looks like it pulled out of something, its not cut. Can find nothing in my wiring diagrams that tells me what this is and where it goes. It was'nt cut and the only thing near there is the alternator and a sensor that another wire that comes down beside the wiring harness goes to...can you help. Thanks CRC